Prove this equation using fields: show F=Bqv

[GCSEsoon]

Homework Statement

Use equations F=BIl I=nAqv show F=Bqv, (help: the no. of particlees in a length l of wire cross-section area A is nAl, when the no. of particlees per unit volume is n)

Homework Equations

F=BIl I=nAqv F=Bqv

The Attempt at a Solution

F=B(nAqv)l
F=B(nnAlqv)l
F=B(n²Al²qv
F=B(n²Al²Itl/t
F=B(n²Al²Il
F=B(n²Al³I

I'm stuck after this, help asap appreciated.

 

[malawi_glenn]

It is quite hard to distinguish small L from big i, fixed it below:

Given:
F=BIL
I=nAqv this should read NAqv where N is the total number of charges
number of charges N in a length L of wire cross-section area A is N = nAL, when the number of charges per unit volume is n

Can you give it another try now?

 

[kuruman]

Can you give it another try now?

I wouldn't put too much hope about now. This decade, maybe.